Chair pedestal



June 1', 1965 D. MOORE 3,186,675

0mm PEDESTAL Filed Nov. 29, 1963 2 Sheets-Sheet 1 INVEN TOR.

+7 7.2. I fm z/a 1. 1/00,

June 1,1965

D. L. MOORE CHAIR PEDESTAL 2 Sheets-Sheet 2 Filed NOV. 29, 1963 INVENTOR. Warm/0 4. ,4/00

( life/15%.

United States Patent M 3,186,675 CHAXR kEDESTAL Donald L. Moore, Columbus, ind, assignor to Hamilton Cosco, Inc, Columbus, Ind a corporation of Indiana Filed Nov. 29, 1963, Ser. No. 326:,fi55 6 Claims. (61. Zed-41%) This invention relates to a pedestal for a chair, and more particularly to a pedestal for a swivel-type chair or the like.

It is an object of the invention to provide a pedestal for a chair which will support said chair in an elevated position, which will permit the height of said chair to be quickly and easily adjusted, and which will provide a stable ground-engaging support for said chair.

In accordance with one form of the invention, there is provided a base comprising a hub having a plurality of arms radiating outwardly therefrom. Conveniently, each of said arms has a downwardly open socket at its outer end for the reception of a ground-engaging caster. A vertically oriented opening extends through the hub and supports a rod projecting above the base for connection to a chair. Said rod is vertically slidable in the hub opening for adjusting the height of the chair above the base.

To releasably retain the rod in the desired position of vertical adjustment, a plate provided with an opening received around said rod is swingably connected to the base. Means adjustably mounted on said base releasably bear against said plate to cause the edges of the plate opening to bear against the rod for releasably retaining it in the desired axial position with respect to the base. Conveniently, said rod and the base opening have cooperative stop means for limiting the vertical adjustment of the rod with respect to the base.

Other objects and features of the invention will become apparent from the more detailed description which follows and from the accompanying drawings in which:

FIG. 1 is a side elevation of a chair mounted on a pedestal embodying the invention, and showing portions thereof broken away;

FIG. 2 is a horizontal section taken on the line 2-2 of FIG. 1;

FIG. 3 is a vertical section taken on the line 33 of FIG. 2;

FIG. 4 is an enlarged vertical section taken on the line 4-4 of FIG. 2; 1

FIG. 5 is a horizontal section taken on the line 55 of FIG. 4; and

FIG. 6 is an enlarged vertical section taken on the line 66 of FIG. 2.

The invention may be employed as a pedestal support for chairs and similar articles of furniture, but for convenience of description, it is described and illustrated herein as being used in association with a swivel-type ofiice chair. I

As shown in FIG. 1, such chair may comprise a seat It to which back supports 12 are connected for supporting a back rest 14 in an elevated position above and to the rear of the seat. The chair is supported on a vertically extending rod 16 operatively connected to the seat 1%? in any convenient manner and extending downwardly therefrom for connection to the chair base.

As shown, the base comprises a hub 13 integrally connected to a plurality of radiating arms 2d. Each of the arms is provided at its outer end with a downwardly open socket 22 in which a ground-engaging caster 24 is mounted. Intermediate the hub 18 and socket 22 each of the arms has a T-shaped cross-section including an upper horizontally disposed cross arm 25 and a vertically extending web 26, said web being continuous along its entire vertical extent with the hub 18 and outer socketed portion of the arm. The hub 13 has a vertically extendarsasrs Fatented June 1, 1 965 ing opening 28 which extends for its full length and receives the lower portion of the rod 16. Pairs of angularly spaced grooves 29 and 36 are formed in the opening 28 and receive pairs of pins 31 and 32, respectively, mounted on the rod 16 adjacent its lower end. The grooves 2? extend from the lower end of the hub 18 to points disposed below the upper end of the opening 28 to.

thus act in combination with the pins 31 to limit the upward sliding movement of the rod 16 with respect to the chair base. Conversely, the grooves 30 extend from the upper end of the hub 18 to points spaced above the bottom end of said hub to act in combination with the pins 3?. to limit the downward sliding movement of the rod 16 relative to the base. As shown in FIG. 4, the hub 18 is provided with cutout portions 33at the'lower ends of the grooves 29 to permit the pins 31 to be inserted into the rod 16 after the lower end of said rod has been inserted into the hub.

As will be apparent, the pins 31 and 32 riding in the grooves 29 and 36 limit the sliding movements of the rod 16 relative to the base for thus controlling the maximum and minimum height adjustments of the chair. In order to releasably retain the rod 16 in the desiredposition of adjustment between its maximum limits of adjustment, there is provided a plate 34- mounted on the base between said base andthe chair. The plate 34 has a centrally disposed opening 35 through which the rod 16 extends. Cutouts 36 are formed in the opening 35 through which the pins 32 may slide for inserting the rod 16 through the plate and hub during assembly. The plate 34 is operatively connected to the base by a pair of downwardly extending fingers 37 and 38 disposed on opposite sides of the rod 16. The finger 37 is swingably carried in an opening 39 formed in the upper face of the hub 18 and retained in said opening by its lower hooked end 4%. The finger. 38 is vertically movable in an opening 42 formed in the upper face of the base and terminates at its lower end in an outwardly projecting extension 43 projecting outwardly beyond the extent of the hub 13 in a position of access. An upwardly projecting boss 44 is formed on the plate 34 adjacent the finger 38 and has an opening .6formed therein through which an adjusting bolt 4-7 extends. The head 48 on said bolt is engageable with the boss 44 and its threaded shank is carried in a tapped opening in the hub 18.

To adjust the axial position of the rod 16 for adjusting the height of the chair, the adjusting bolt 47 is moved upwardly and the plate 34 is swung upwardly relative to the base by the finger projection 43. In this manner, the rod 16 is freely slidable in the plate for adjusting its vertical positioning relative to the base, said adjusting movements being guided and limited by the pins 31 and 32 acting in combination with their associated grooves 29 and 30. When the rod is disposed at the desired vertical position, the bolt 47 is tightened to cause its head 48 to bear against the plate 34 and swing said plate downwardly relative to the base so that the edges of the plate opening 35 bear against said rod retaining it in the desired position of adjustment.

I claim:

1. In a pedestal for a chair,

(a) a base comprising a hub provided with a vertically extending opening and a plurality of radially projecting arms,

(b) a vertically extending rod carried in the hub opening and projecting above said base for interconnection to a chair,

(c) a plate having one of its ends swingably mounted in an opening formed in. said base and having an opening formed therein in which said rod is received, and

(d) a bolt threadably connected to said base and releasably bearing against said plate to swing said plate about its connection to the base to cause the edges of the plate opening to bear against said rod for releasably retaining said -rod,in a -fixed axial position with respect to said base.

2. In a pedestal for a chair,

'(a) a base comprising a'hub provided with a vertically extending openingand a plurality of radially project- -mg arms,

(b) a'vertically extending rod carried in the hub opening and projecting above said base for interconnection to a chair,

() "a plate having an ,openingformed therein in which said .rod'is received, said plate having a pair of fingers disposed on opposite sides ofsaid rod, one of said fingers being swing'ably received in a second opening in said base and the other'finger being movably received in. a third opening in saidbase, and

(d) means adjustably mounted onsaid base andreleasably'bearing against said plate to cause the edges of the plate opening to bear against said rod for releasably retaining said rod in a fixed axialposition with respect'to said base.

3. The invention asset forth in claim 2'in which (a) said other plate finger extends through said third 'base opening and projects horizontally outwardly from said base into a position of access.

4. In a pedestal for a chair,

(a) a base comprising a hub and plurality of radially projecting arms,

(b) said hub having a vertically oriented opening extending therethrough with a plurality-of vertically extending, angularly spaced grooves formed therein, at least one of said grooves extending from the bottomof said opening to ,a point below the top of said opening and atleast .one otherof saidgrooves extendingfrom the top of said opening to a point abovethe bottom of said opening,

(c) a vertically extending rod in said hub opening and projecting above said .base for interconnection to a chair,

((1) a plurality of pins projecting outwardly from said rod and vertically slidable, in said, grooves, whereby saidpins and said grooves will lirhit the axial movements of saidrod,

(e) aplate swingably connected to said base and having anopenin'g formed therein in which said [rod .is received, and

( f) means adjustably mounted on said base and releasably bearing against said plate to cause the edges of the plate opening to bear against said rod for releasably retaining said rod in a fixed axial position with respect to said base.

tion that (a) said hub has an ofiset cutout formed in its side walls in alignment With the lower end of said groove extending to the bottom of the hub opening, and

(b) said plate has an ofisetcutout along the edge of its opening in alignment with'the base opening groove extending to the top of said base opening.

6. In a pedestalfor a chair,

(a) a base comprising a hub and a plurality of arms integral with said hub and radiating outwardly therefrom, each of said arms having a downwardly open caster-receiving socket at its outer end and T-shaped cross-section along its length intermediate said hub and socket,

(b) said hub having a vertically oriented opening extendingtherethroug'h with aplurality of vertically extending angularlyspaced grooves formed therein, at least one of said grooves extending from the bottom of the opening to a'point below the top of said'opening and at least one other groove extending 'from the top of said opening to a point above the bottom of said opening,

(c) a vertically extendingrod in said hub opening and projecting abovesaid base for interconnection to a chair, a

(d) a pluraltiy of pins projecting'outwardly from said rod and vertically slidable in said grooves,

(e) a plate having an opening formed therein in which said rod isreceived, said plate having a pair of fingers disposed on opposite sides of said rod, one of said fingers'being swingably received in a second opening in said base and the other finger being 'movably received in athird opening in said base, and

(f) means adjustably mounted'on said base and releasably bearing against said plate to cause the edges of the plate opening to bear against said-rod -for releasably retaining said rod in a fixed axial position with respect to said base.

References Cited by the'Examiner UNITED STATES PATENTS 1,416,896 5/22 Simmons 248-414 1,919,114 7/33 Ley 248-414 2,673,590 3/54 Hamilton 2484l0 2,731,072 1/56 Post 248-191 2,913,208 11/59 McKinley 248- 194 2,939,514 6/60 Buettner et al 248l94 2,987,110 6/61 Cramer 248l94 2,992,803 7/61 Good 248194 CLAUDE A. LE ROY, Primary Examiner. 

1. IN A PEDESTAL FOR A CHAIR, (A) A BASE COMPRISING A HUB PROVIDED WITH A VERTICALLY EXTENDING OPENING AND A PLURALITY OF RADIALLY PROJECTING ARMS, (B) A VERTICALLY EXTENDING ROD CARRIED IN THE HUB OPENING AND PROJECTING ABOVE SAID BASE FOR INTERCONNECTION TO A CHAIR, (C) A PLATE HAVING ONE OF ITS ENDS SWINGABLY MOUNTED IN AN OPENING FORMED IN SAID BASE AND HAVING AN OPENING FORMED THEREIN IN WHICH SAID ROD IS RECEIVED, AND (D) A BOLT THREADABLY CONNECTED TO SAID BASE AND RELEASABLY BEARING AGAINST SAID PLATE TO SWING SAID PLATE ABOUT ITS CONNECTION TO THE BASE TO CAUSE THE EDGES OF THE PLATE OPENING TO BEAR AGAINST SAID ROD FOR RELEASABLY RETAINING SAID ROD IN A FIXED AXIAL POSITION WITH RESPECT TO SAID BASE. 